Machine for casting by injection



- .Fan. 13, 1925. 1,523,183

0. ECKERT MACHINE FOR cAsuqING BY INJECTION Filed Oct. 7, 1921 4 Sheets-Sheet l 5 ja a 4 27 o. ECKERT MACHINE FOR CASTING-BY INJECTION Filed Oct. '7, 1921 4 Sheets-Sheet 2 Jan. 1925- 523,183

. V o. ECKERT MACHINE FOR CASTING BY INJECTION Fild Oct 7, 1921 4 Sheets-Sheet a 1-3, 1925. 1,523,183 o. ECKERT MACHINE FOR CASTING BY INJECTION Filed Oct. 7, 1921 4 Sheets-Sheet 4 I flyi- 2 fl i- Patented Jan. 13, 1925.

OTTO EGKERT, OF NUREMBERG, GERMANY.

MACHINE FOR CASTING BY INJECTION.

Application fiIed October 7, 1921. Serial No. 506,220. I

I To all whom it may concern:

Be it known that I, O'r'ro EoKnRr, a citizen of the German Republic, residing at Nuremburg, Germany, have invented certain new and useful Improvements in Machines for Casting by Injection (for which I have filed application in Germany, Sept. 25, 1920), of which the following is a specification.

This invention relates to machines for diecasting or for-casting metal under pressure in metal moulds and it concerns specially the means and devices for adjusting the nozzle for the injection of the casting metal under pressure. According to the invention the base plate which supports the movable parts of the mould is adjusted in the direction of the longitudinal axis of the machine, transversely to. this direction and in vertical direction and it is further adapted to be oscillated in the horizontal plane together with the mould parts which it supports.

' The elements which control the movements of the mould parts are themselves adjustable as regards their distance from one another and means are further provided for bracing the base plate and for securing the same in its position after it has been ad-- j usted with regard to the stationary furnace casing.

In order that the, invention may be clear- 1y understood, I shall proceed to describe the same with reference to the form of construction shown by way of example on the accompanying drawings, wherein Fig. 1 is a side elevation of the improved casting machine.-

Fig. 2 is a plan view of the same.

Fig. 3 is a longitudinal section along the middle line.

Fig. 4 is a cross section on line AB of Fig. 3.

Fig. 5 is a rear view of the jacket of the melting vessel.

Fig. 6 is a plan view of Fig. 5, thehood and melting vessel being removed.

Fig. 7 is a top View of the melting vessel. The base frame of the machine consists of the two feet 1 and 2 which have hori zontal borings in which the. spindles 3, 4 are located, nuts screwed upon the ends of said spindles serving to fix the spindles in position so that the spindles and'feet form a rigid frame. The jacket 5 of the melting vessel is mounted at one end of said base frame by means of extensions of the front wall 5 and of the rear wall 5 which have longitudinal borings'pushed over said spin- .dles 3 and 4. The side walls 5 and 5 of thejacket or casing are removable and they are'fixed to the end faces of the front wall and rear wall by means of screws. The casing or jacket 5 is lined with heat insulating plates 6, 6", 6 of fire brick, asbestos or the like (Fig. 6). The supporting plates 7, 7 7, 7 which form brackets in the upper part of the casing 5 serve as supports for the melting vessel 8. The front wall 5 of the casing 5 has an opening 5 in which the injectingnozzle 8 of the melting vessel 8 is located and the rear wall 5 has an opening 5 of the size of the melting vessel which is obturated by a removable plate 9 securely locked in position by a lever 10 with stud 10 Thehood 11 with an uuper extension 11 in the shape of a truncated cone is fixed upon the casing 5 for the melting Vessel by means of screws. The upper extension 11 of the hood 11 has an axial boring in which the piston rod 12 is guided. The pressure piston I3, which has a neck 13 and a head 13", is freely inserted in a corresponding groove 12 of the lower end of the piston rod 12.

The pressure piston is guided in a nozzle 8 of the melting vessel 8. An annular space 8 is arranged in the melting vessel designed to receive the metal which at the liquefied state flows through the nozzle S into the cylindrical space 8", when the pressure piston 13 is raised. When the piston 13 is being lowered the molten metal is forced out from the boring 8 through the channel 8 to the nozzle 8 through which it is in- ,jected into the mould.

A column 15 fixed upon the rear wall 5 of the casing 5 has a slot 15 in its upper end in which the head 16- is pivotably mounted by means of the stud :16. This head 16 has a slot 16 which serves as bearing for the two-armed lever 18 fulcrumed in said slot 16 by it pivot pin 17 and extending diametrically over the casing 5 of the melting vessel. To the rear arm of lever 18 one end of a pull spring 20 is fixed whose other end is hooked upon a hook 21 (Fig. 5) screwed into a perforated bolt 22 fixed to the wall 5 The hook 21 is secured in its position by means of a nut 23 screwed upon its lower end. This nut 23 serves for regulating the tension of the spiral spring 20. To the free end of lever 18 a shackle 24 slides along the lower edge of the lever.

one-armed lever 28 is pivota-bly mounted in the slot of the upright 27. The free end of this lever 28 engages with the shackle 24. When the lever 28 is lowered the roller 26 In proximity of the llllCI'lIlTIOf lever 28 an abutment 28 is arranged which limits the upward movement of the lever system. The upward movement of the spring controlled two-armed lever 18 and of the piston rod 12 connected with the same is stopped by a groove l2 'of the piston rod and by the point of an adjustable screw 29 which is screwed into the wall of the upper extension 11 so that its point engages with said grooves 12 and can .come in contact with the lower end of said groove.

Upon the front part of the base frame a plate 30 is mounted upon which two lateral cheeks 30 and 30 with overhanging inwardly directed inclined surfaces are arranged. The plate 30 rests upon three supports, viz the two adjustable screws 31", 31 screwed into female thread borings of feet 1 and the smooth end of the vertical screw spindle 32 which is screwed into a threaded boring of a bridge plate 33 arranged between the horizontal spindles 3, 4 upon which the bridge plate is guided by means of collars 33 and 33 The sliding plate 30 with the parts of the machine mounted upon the same is adjustable with regard to .the fixed parts of the machine as well in longitudinal direction as in vertical direction, it can be further turned around the head of the screw spindle 32. The movement in longitudinal direction is controlled by the horlzontal screw spindle 34 with hand wheel 34. The head 34 of the spindle 34 engageswith a boring of thebridge plate 33 and is mounted in the boring so that it can revolve but not move in longitudinal direction. The head 34 of the screw spindle 34 has a circular groove 34 with which engages the end of an adjustable screw 35 which traverses the end of the bridge plate By turning the screw spindle 34 guided in the female threaded boring of foot 1 the bridge plate 33 is moved along the horizonal spindles 3, 4 in longitudinal direction, this movement being transferred by the vertical screw spindle 32 upon the sliding plate 30. The displacement of the sliding plate 30 perpendicularly to the lon 'tudinal axis of the machine is contro led by the plate 37 in connection with the screw spindle 36 having a hand wheel 36. ,'The plate 37 is guided in a right angular cavity 38 in the lower side ofthe sliding plate 30 perpendicularly to the longitudinal axis and it is tranversed by four screw bolts 39 whose square heads 39 slide in two slots 40 which are parallel to the cav-. ity 38 and it is supported by nuts screwed upon the lower ends of said screw bolts 39. The end of the screw spindle 36 is mounted in an extension piece 37 arranged perpendicularly to the plate 37 but downwardly directed, sothat the screw spindle can revolve in said extension piece but not move in longitudinal direction and it traverses the internallythreaded boring of an extension piece 30 'downwardly projecting from the slide plate 30. When the hand wheel 36 of the hori'zontal screw spindle 36 is being turned the sliding plate 30 is displaced perpendicularly to the longitudinal axis in the horizontal plane with regard to the plate 37 which rests fixedly upon the screw spindle 32. The adjusting of a slide plate 30 in vertical direction is controlled by the screw spindle 32 with hand wheel 32 whose head is held by the sleeve 3'? of plate 37. Two bearing blocks 41, 42 are screwed upon the sliding plate 30. They can be adjusted according to requirement in lateral slots 43, 44 of the plate 30 which are parallel to the axis and they can be secured in position by tightening of the bearing screws which traverse the said slotsand they can further be secured against displacement by means of the adjusting screws 14*, 14 In the bearing blocks the shaft 45 with the eccentric disk 46 is mounted. Upon the circumfen ence of the eccentric disk 46 slides ring 47 with sleeve 48. The reversing of the eccentric is effected by the lever 49. Between the cheeks 30, 30 of plate 30 slides the carriage 50 upon which the guide block 51 is mounted which hasa cylindrical cavity and two lateral extensions 51 51 which have each a boring. The guide block 51 islimited at the upper part by a horizontal plane which intersects the cylindrical cavity so that an opening. is formed which extends in the direction of the axis of the boring and which is covered by plate 52 which has a window 52. In the axial boring of the guide block slides the hollow cylinder.53 whose upper part is limited also by a horizontal plane so that the intersecting edges of the outer surfaces of guide block and hollow cylinder are in contact.

"The hollow cylinder 53 has an upper window 53 and two lateral windows '53 53. The rear circular end face 54 of the hollow cylinder has a concentric boring and also two lateral perforated extensions like the guide block 51. Upon the sliding plate 30 there is further mounted a plate 55 which continues upward as wall 53 at the end of the sliding plate 30 and which has a vertical slot 55 and two lateral holes. The borings in the lateral extensions of the guide block 59 and of the end face 54 of the hollow cylinder 55 and also the holes in the wall 55 serve for the reception of the two stays 56, 57 which are secured in their position by the two wing screws 80, 81 which traverse the extensions of the guide block. The stays serve for securing against lateral oscillations the hollow cylinder 53 which slides in the block 51.

The moulds for the casting by injection which are designed to receive the castings in hollow spaces are made in two parts. The one part 58 is screwed upon the inner surface upon the wall 55, the part 58 being fixed in the concentric boring of the end disk 54 of the hollow cylinder 53. The hollow cylinder 55 which slides on the guide block 51 serves for the reception of the ejecting device. This device consists of a cylinder 59 having a longitudinal slit 59 The adjusting screw 61 is arranged in the front end wall 59 of said cylinder. The rear end wall 59 of the cylinder is traversed by the screw bolt 60 with which are connected the cylindrical body 60 provided with holes, the disk 60 and the ejector pin 60. The mould part. 58 has an axial boring 62 in which the disk 60 is median slit 64 and with a screw bolt 64 guided. The boring 62'is separated by the wall 58 freely traversed by the ejector pin, from the hollow space which is designed to receive the casting and it is closed at the front end by a disk 58 having a concentric boring and serving as guide for the cylindrical body 60".

The screw bolt 63, which freely traverses one of the walls of the guide block 51 and the two lateral windows 53", 53 of the hollow cylinder 53 and which is conducted between the longitudinal slot 59 of the hollow cylinder 59 is screwed in female threads of the opposite Wall of the guide block 51. The coupling between the hollow cylinder 53 which is closed by the disk 53 with a flap 53 standing perpendicularly to said disk and by the sleeve 48, is effected by a cylindrical connecting piece 64 with a standing perpendicularly to the end wall 64*. The flap 53 inserted in the slit 64 of the connecting piece is hingedly connected with the same by the bolt 65, the screw bolt64 being fixed in the sleeve 48. The bearing blocks 41, 42 are securely connected by lateral stays 66, 67 in the casing 5 fixed upon the base frame so that they cannot move in longitudinal direction and so that the movable parts of the machine are secured against shaking. The stays 66, 67 have threaded parts 66 67 at theone end and eyes-66", 67 at the other end which are placed over the screw bolts 68, 69 of the casing of the vessel and fixed by nuts, whilst the threaded ends 66*, 67 traverse the slit bolts 83, 84 fixed to the bearing blocks 41, 42 and nuts are screvvedupon the threaded ends. At the front end of the guide block 51 a hook 70 is fixed upon which one end of the pull spring 71 is hooked whose other end-is placed around the head. of the small column 72. The spring 71 effects the automatic return of the carriage 50. This return movement is limited by a horizontal column 73 with adjusting screw 73 against which the carriage strikes, said column 7 3 being pivotably fzixed in the slit head of avertical column The smelting vessel 8 is heated by a gas or oil stove which is not shown in the drawing. The heating gases act first upon the bottom part of the vessel and penetrate through the openings 76, 77 of the plate of the vessel (Fig. 7) into the 1100(111 so that they act also from above before they escape into the atmosphere through the open front end of the hood.

In front of'the casing-5 a plate 78 is arranged which has a longitudinal slot 78*. The plate 78 has collars 78 7 8 which surround the columns 3 and 4 so that the plate is guided in longitudinal direction. A heating device iadjustably arranged in the slot 78 and not shown on the drawing serves for constantly heating the injecting nozzle 8 so that'the solidfying of the metal in the nozzle is prevented which is situated outside the casing of the vessel. a

The machine is made ready for working by fixing the two parts 58 and 58 of the mould upon the wall 55 and in the face plate 54. If very complicated moulds are to be used or if parts ofthe machine in proximity of the furnace are exposed to the action of the heat from the boiler the guide plate 30 with the parts which it supports is pivotable around the bolt 32 and the mounting together can be carried out without difficulty. This oscillating of the plate 30 is preferably used also if damaged and not easily accessible parts of the machine have to be replaced. After the insertion of the parts of the mould the orifice of the inlet channel of the mould part 58 is made to register with the orifice of the injecting nozzle 8*, the position of these two parts the one with regard to the other having to be adjusted very accurately.

"The position in vertical direction is regulated by means of the vertical screw spindle 32 andof the two adjusting screws 31, 31". In lateral direction the adjustment is made by means of the horizontal spindle 36. In longitudinal direction the screw spindle 34 serves for adjusting. The distance has now to be calculated which is necessary for the ejection of the cast piece by the ejector when the parts of the mould, are separated, said cast piece being in the mould part 58*. If the hollow cylinder 53 coupled with the eccentric 46 is moved backward the carriage 50 with the mould part- 58 fixed upon the wall 55' is moved back also by the action mould parts which is thus obtained is sufficient for the ejection of'even the longest cast pieces by the ejecting device. If shorter cast pieces have to be ejected the distance between the parts of the mould is regulated by adjustment of the bearing blocks 41, 42. In most cases the necessary interval can be produced already by adjusting the coupling member 64 with reward tothe sleeve 48. During the back movement of the hollow cylinder 53 the screw bolt 60 of the ejector strikes against therod 63 which traverses the} slot 59 of the cylinder and is fixed in thewall of the stationary guide block 51. Theejector pin 60' is thus pressed against the cast\piece from which the mould part 58 has been removed and this cast piece is ejected. When the mould parts are closed by reversing the eccentric lever 49 mould parts 48 come at first in contact with the mould part 58. The closed mould is thenremoved'towards the nozzle 8 and atthe end of the movement it is directly pressed against this nozzle. In this. position it is important that the ejector pin 60 does not project into the mould but is flush with the wall 53. The accurate regulation of the position of the ejector pin with regard to the wall 53 is effected by means of the screw bolt 61 which is turned with regard to the cylindrical body 59 or by screwing the screw bolt 60 into the end case 59 of the cylindrical body 59. The plate 52 is removed when the ejector is being adjusted so that the regulation can be easily effected through the longitudinal slot 53 of the hollow cylinder 53. A slight alteration'of the ejector during the serving can be effected through the upper window 53 or through the window 52 of the plate 52 and through the two lateral windows 53 and 53. The two lateral stays 56, 57 are now put in place upon which the end disk 54 of the hollow cylinder 53 is guided and the outer stays 66, 67 are fixed to the bearing blocks 41, 42 and to the lateral walls 5, 5 of the casing of the vessel. The tightening of the stays 66, 67 is effected by the screwing home of the nuts or counternuts upon the bolts 83, 84 and upon the threaded parts 66, 67

of the stays. The adjusting of the nuts is necessary specially if at the casting burrs are produced at the joint of the two parts of the mould. Aftenall these preparations have been finished the casting can be started. g

The liquified metalis, admitted into the mould with the aid of the special arrangement of the levers. By the sudden strokelike action of the lever 28 the liquified alloy is pressed by the pressure piston 13 with great speedinto the mould. When the lever 28 which originally projects obliquely upward is depressed, this lever get-s gradually into alignment with the lever 18 so that the lengths of the .two levers sum up, whereby the velocity with which the liquified metal is pressed into the mould is reduced, the

pressure being however increased consider-' ably so that the formation of air bubbles in the cast is prevented. The great acceleration at the beginning of the casting and the gradual retardation with simultaneous increase of pressure are absolutely necessary in order to produce perfect cast pieces free from blisters when tough hard alloys are used.

A special advantage of the machine consists in this that the exchange of the melting vessel and the pressure piston can be effected at any time without troublesome and timerequiring work if for instance larger sized casting pieces should require a larger vessel with larger piston or if a damaged pressure piston should have to be replaced. For removing the melting vessel the lever 10 has to be pulled back and the door 9 is removed, whereupon the vessel 8 can be taken out through the opening 5 in the rear wall 5 of the casing and another vessel can be inserted. For removingthe pressure piston 13 the adjusting screw 29 in the extension 11 has to be screwed off so far that the piston rod 12 or the lever 18 are no longer stopped in their upward movement. The pressure piston 13 gets out of its guide 8 and it can now be taken out of the slots 12 of the piston rod 12. The insertion is carried out in the same simple manner. No complicated work nor. time-requiring interruptions of service are required. The loose connection between pressure piston and piston rod presents the further advantage that the pressure piston has the required liberty of movement to adjust itself automatically in its guide. In this, manner unilateral friction and jamming, as happens frequently when the pressure piston in the piston rod are rigidly connected, are avoided and the durability of the pressure piston is considerably increased.

The ejecting device is positively guided in the hollow cylinder 53 or in the part 58 of the mould fixed to said hollow cylinder and is gently conducted against the core to be ejected. The hollow cylinderitself is not only secured in the guide block 51 but further by the two lateral stays 56," 57. These stays can be easily removed which will become necessary if the mould is to be opened from above and if the core has to be pushed out laterally, the hollow cylinder being then sufliciently guided in the bearing block alone so that inaccuracies are avoided.

.Owing to the adjustability of the bearing blocks and owing to the insertion of the coupling member 64 by whose adjusting the range of the hollow cylinder can be extended or reduced casting pieces of the varying dimensions can be produced with one and the,

' to the other, means for positively guiding said mould with regard to said vessel, means for injecting the liquefied metal through said nozzle into said mould at first with the required speed and then with the required pressure, an ejecting device for ejecting the cast piece from the mould, means for operating said ejecting device, means for regulating the position of the mould with regard to said injecting nozzle, and means for securing the diflerent parts of the machine so that the shaking, edging and displacing of theparts with regard to one another are prevented, substantially as described and shown and for the purpose set forth.

2.'Machine for casting by injection comprising in combination a base frame, a melting vessel composed of removable plates, heat insulating plates lining the inner surfaces of said removable plates, means for locking the removable plates in position, a casing enclosing said vessel, means for heating the vessel and for melting the metals,

specially hard alloys, in a specially favorable manner, an injecting nozzle of said vessel, a mould composed of several parts, means for positively guiding said parts of the mould the one with regard to the other,

Y means for positively guiding said mould with regard to said vessel, means for injecting the liquefied metal through said nozzle into said mould at first with the required speed and then with the required pressure, an ejecting device for ejecting the cast piece from the mould, means for operating said ejecting device, means for regulatin the position of the mould with regard to said inecting nozzle, and means for securing the different parts of the machine so that the shaking, edging and displacing of the parts with regard to one another are prevented,

substantially as described and shown and for i the purpose set forth.

5. Machine for casting by injection comprising in combination a base frame, a melting vessel, a casing enclosing, said vessel, a.

hood upon said casing having a vertical boring and an outlet for the heating gases, a heating device under said vessel, a horizon tal partition in said casing at about the middle of the vessel having openings for the passage of the heating gases so that the same flow around the top part of the vessel before escaping from said hood. a cylindrical vertical extension of said hood, a pressure piston in said vessel, the piston ,rod guided in said extension of the hood, an injecting nozzle of said vessel, a mould composed of several parts, means for positively guiding said parts of the mould the one with regard to the other, means for positively guiding, said mould with regard to said vessel, means for injecting the liquefied metal through said nozzle into said mould at first with the required speed and then with the required pressure, an ejecting device for ejecting the cast piece from the mould, means for operating said ejecting device, means for regulating the position of the mould with regard to said injecting nozzle, and means forsecuring the different parts of the machine so that the shaking. edging and displacing of the parts Wit-l1 regard to one another are presented, substantially as described and shown and for the purpose set forth.

4. Machine for casting by injection comprising in combination a base frame. a melting vessel, a casing enclosing said vessel composed of a fixed bottom plate and of four removable side plates of which the rear plate has an opening for the removal of said vessel, a door closing said opening, a lever and a bolt for locking said door in said,

plate, means for heating the vessel and for melting the metals, specially hard alloys, in a specially favorable manner, an injecting nozzle of said vessel, a mould composed of several parts, means for positively guiding said parts of the mould the one with regard to the other, means for positively guiding said mould with regard to said vessel, means for injecting the liquefied metal throu h said nozzle into saidmould at first with t e required speed and then with the required pressure, an ejecting device for ejecting the cast piece from the mould, means for operating said ejecting device, means for regulating the position of the mould with re gard to said injecting nozzle, and means for.

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5. Machine for casting by injection com tical extension ofsaid hood, a pressure pis-. ton in said vessel, the piston rod guided in said extension of the hood, levers with double transmission for operating said pressure piston, an injecting nozzle of said vessel, a mould composed of several parts, means for positively guiding said parts of the mould the one with regard to the other, means for positively guiding said \mould with regard to said ,vessel, means for injecting the liquefied metal through said nozzle into said mould at first with the required speed and then with the required pressure, an ejecting device for ejecting the cast piece from the mould, means for operating said ejecting device, means for regulating the posit-ion of the mould with regard to said injecting nozzle, and meansfor securing the different parts of the machine so that the shaking, edging and displacing of the parts with regard to one another are prevented, substantially as described and shown and fomthe purpose set forth.

6. Machine for casting by'injection comprising in combination a base frame, a melting vessel", a casing enclosing said vessel, a hood upon said casing having a vertical boring and an outlet for the heating gases, a heating device under said vessel, a horizontal partition in said casing at about the middle'of the vessel having openings for the passage of the heating gases so that the same flow around the top part of the vessel before escaping from said hood, a cylindrical vertical extension of said hood, a pressure piston in said vessel, the piston rod guided in said extension of the hood, :1 two-armed lever diagonally arranged upon said hood of the casing. an upright at the rear end of said casing having a slit in its head, a pivot bolt ofsaid lever fixed in said slit, a pull spring at the rear end of said lever, means for piv- .otally fixing the long front arm of said lever with the upper end of said piston rod, a shackle at the front end of said lever, a pulley 1n the free end of said shackle, a short uprightat the front end of said casing, a one-armed hand lever pivotably mounted in the said front upright, engaging with said shackle and bearing upon said pulley, an in ectlng nozzle of said vessel, a mould composed of several parts, means for positively guiding sald parts of the mould the one with regard to the other, means for positively guiding said mould with regard to said vessel, means for injecting the liquefied metal through said nozzle into said mould at first with the required speed and then with the required pressure, an ejecting device for ejecting the cast piece from the mould, means for operating 'said ejecting device, means fo regulating the position of the mould wit 1 regard to said injecting nozzle, and means for securing the different parts of the machine so that the shaking, edging and displacing of the parts with regard to one another are presented, substantially as described and shown and for the purpose set forth.

7. Machine for casting by injection comprising in combination a base frame, a melting vessel, a casing enclosing said vessel, a hood upon said casing having a vertical boring and an outlet forthe heating gases, a heating device under said vessel, a horizontal partition in said casing at about the middle of the vessel having openings for the passage of the heating gases so that the same flow around the to part of the vessel before escaping from sai hood, a cylindrical vertical extension of said hood, a pressure iston in said vessel, the piston rod guided in said extension of the hood, said piston rod having a vertical groove, a two-armed lever diagonally arranged upon-said hood of the at the rear end of said lever, means for pivotally .fixing the long front arm of said lever with the upper'end of said piston rod, a shackle at the front end of sald lever, a pulley in the free, end of said shackle,

a short upright at the'front. end of said casing, a one-armed hand lever pivotably mounted in said front upright, engaging with said shackle and bearing upon said pulley, a stop in proximity of the fulcrum of said one-armed lever for limiting the downward movement of said lever by contact of said shackle with'said stop, an adjustable stop screw projecting through said-extension of the hood so that its point engages with said groove of the piston ro dandilimits the upward movement of said j-leversystem by coming in contact withthe Lend of said 'groove, an injecting nozzle ofsaid vessel, a mould composed of several parts, means for positively guiding said parts of the mould the one with regard to the other, means for positively guiding said mould with regard to said vessel, means for injecting the liquefied metal through said nozzle into said mould at first with the required speed and then with the required pressure, an ejecting device for ejecting the cast piece from the mould, means for operating said ejecting device, means for regulating the position of the mould with regard to said injecting nozzle,

and means for securing the different parts of the machine so that the shaking, edging and another are prevented, substantially as described and shown and for the purpose set forth.

8. Machine for casting by injection comprising in combination a base frame, a melting vessel, a casing enclosing said vessel, a hood upon said casii'ig having a vertical bor ing and an outlet for the heating gases, a heating device under said vessel, a horizontal partition in said casing at about the mid-. dle of the vessel having openings for' the passage of the heating gases so that the same flow around the top part of the vessel before escaping from said hood, a cylindrical vertical extension of said hood, a pres sure piston in said vessel, an upwardly extending neck of said piston, a head upon said neck, the pistonrod guided in saidextension of the hood having a cavity at its lower end for the reception of said neck and head of the piston, an injecting nozzle of said vessel, a mould composed of several parts, means for positively guiding said partsof the mould the one with regard to the other, means for positively guiding said mould with regard to said vessel, means for injecting the liquefied metalthrough said nozzle into said mould at first with the required speed and then. with the required pressure, an ejecting device for ejecting the cast piece from the mould, means for operating said ejecting device, means for regulating the position of the mould withregard to said injecting nozzle, and means -for securing the different parts of the machine so that the shaking, edging and displacing of the parts with regard to one another are prevented, substantially as described and shown and for the purpose set forth.

91 Machine for casting by injection comprising in combination a base frame, a melting vessel, a casing enclosing said vessel, means for heating the vessel and for melting the metals, specially hard alloys, in a specially favorable manner, an injecting nozzle of said vessel, a mould composed of several parts, means for positively guiding said parts of the mould the one with regard to the other, means for positively guiding said mould with regard to said vessel, means for injecting the liquefied metal through said nozzle into said mould at first with the required speed and then with the required pressure,- an ejecting device for ejecting the cast piece from the mould, means for operat ing said ejecting device, a guide plate movable in longitudinal and invertieal directions carrying said 'mouldand accessory parts, a horizontal hand operated screw spindle for moving said guide plate towards and away from said casing, a vertical screw spindle for'adjusting, the position of said guide plate in vertical direction, said guide plate being pivotably mounted upon saidvertical spindle a horizontal spindle standing at right angles to said first horizontal spindle, a plate inserted in the lower surface of the said guide plate acted upon by said second horizontal spindle for adjusting said guide plate in lateral directions.

10. Mac ine for casting by injection comprising in combination a base frame, a melting vessel, a casing enclosing said vessel, means for heating the vessel and for melting the metals, specially hard alloys, in a specially favorable manner, an injecting nozzle of said vessel, a mould composed of several parts, a guide plate upon which said mould is' mounted having two longitudinal slots at its front end, two bearing blocks movably mounted in said longitudinal. "slots, an eccentric revolubly mounted on said bear ing blocks, a hand lever for operating said eccentric, means for connecting said eccentric with the one part of said mould, adjustable set screws engaging with said longitudinal slots of said guide late for securing the said bearing blocks in their position, means for injecting the liquefied metal through said nozzle into said mould at first with the required speed and then with the required pressure, an ejecting device for e ecting the cast piece from the mould, means for operating said ejecting device, means for regulating the positlon of the mould with regard to said injecting nozzle and means for securing the different parts of the machine so that the shaking, edging and displacing of the parts with regard to one another are prevented, substantially as described and shown and for the \purpose set forth.

11. Machine for casting by injection comprising in combination a base frame. a melting vessel,- a casing enclosing said vessel, means for heating the vessel and for melting the metals. specially hard alloys, in a specially favorable manner, an injecting nozzle of said: vessel, a mould composed of several parts, a guide plate upon which said mould is mounted having two longitudinal slots at its H front end, two bearing blocks movably mounted in said longitudinal slots, an eccentric revolubly mounted in said bearing blocks, a hand lever for operating said eccentric, adjustable set screws engaging with said longitudinal slots of said guide plate for securing I the said bearing blocks in their position, a hollow cylinder in which said mould parts are guided, a couplin member hingedlv and adjustably connecting said hollow cylinder with said eccentric, means for injecting the liquefied metal through said nozzle into said mould at first with the required speed and then with the required pressure, an ejecting device for ejecting the cast piece from the mould, means for operating said ejecting desaid ejecting device, means forre the purpose set forth.

12. Machine for casting by injection com- .prising in combination a base frame, a melting vessel, a casing enclosing said "essel,

means for heating the vessel and. for melting the metals, specially hard alloys, in a,

specially favorably manner, an injecting nozzle of said vessel, a mould composed of several parts, a guide plate upon which said mould is mounted having two longitudinal slots at its front end, two bearing blocks movably mounted in said longitudinal slots, an eccentric revolubly mounted in said bearing blocks, a hand lever for operating said eccentric, adjustable set screws engaging with said longitudinal slots of said guide plate for securing the said position, a hollow cylinder in which said mould parts are guided having an upper window and two lateral windows, a coupling member hingedly and adjustably' connecting said hollow-cylinder with said eccentric, a block adjustably mounted in said guide plate and carrying said hollow cylinder, a guide plate fixed to said block cover ing said hollow cylinder and said block and having a window corresnondino with the said upper of the hollow cylinder, means for injecting the liquefied metal through said nozzleinto said mould at first with the required speed and then with the required pressure, an e ecting device for ejecting the cast piece from the mold, means for operating ulating the position of the mould with regar to said injecting nozzle, different parts of the. machine so that the shaking, edging and displacing of the parts with regard to one another are prevented, substantially as described and shown and for the purpose set forth.

Machine for casting by injection comprlsing in combination a base frame, a melting vessel, a casing enclosing said vessel, means for heating the vessel and for melting the metals, specially hard alloys, in a specially favorable manner, an injecting nozzle of said vessel, a mould composed of several parts, a guide plate upon which said mould is mounted having two longitudinal slots at its front end, two bearing blocks movably mounted in said longitudinal slots, an eccentric revolubly mounted in said bearing blocks, a hand lever for operating sala eccentric adjustable set screws engaging with said longitudinal slots plate for securing the said in their position,

of said guide bearin blocks a hollo v cylinder m which bearing blocks in their and means for securing the said mould parts are guided, a coupling member hingedly and adjustably connecting said hollow cylinder with said eccentric, means for injecting the liquefied metal through said nozzle into said mouldv at first with the required speed and then with the required pressure, an ejecting device for ejecting the cast piece from the mould located in said hollow cylinder and consisting of a cylinder having a longitudinal slot, a face plate of said cylinder, a screw bolt in said face plate, a cylindrical body at therear end of said screw bolt, a disk upon the rear end of said cylindrical body and an ejecting pin projecting from said disk and guided in the front part of the mould, means for operating said ejecting device, means for regulating the position of the mould with regard tosaid injectingnozzle, and means for securing the different parts of the machine so that the shaking, edging and displacing of the parts with regard to one another are prevented, substantially as described and shown and for the purpose set forth.

14. Machine for casting by injection comprising in combination a base frame, a melting vessel, a casing enclosing said vessel,

means for heating the vessel and for melting the metals, specially hard alloys, in a specially favorable manner, an injecting nozzle of said vessel, a mould composed of several parts, a guide plate upon which said mould is mounted having two longitudinal slots at its front end, two bearing blocks movably mounted in said longitudinal slots, an eccentric revolubly mounted in said bearing blocks, a hand lever for operating said eccentric, adjustable set screws engaging with said longitudinal slots of said guide plate for securing the said bearing blocks in their position, a hollow cylinder in which said mould parts are guided, a coupling member hingedly and adjustably connect- .means for injecting the liquefied metal through said nozzle into said mould at first with the'required speed and then with the required pressure, an ejecting device for ejecting the cast piece from the mould located in said hollow cylinder and consisting of a cylinder having a longitudinal slot, a face plate of said cylinder. a screw bolt in said face late, a cylindrical body at the rear end of said screw bolt, a disk upon the rear end of said cylindrical body and an ejecting pin projecting from said disk and guided in the front part of the mould, a rod fixed in the guide block and traversing said longitudinal slots of the cylinder of the ejecting device designed to operate the ejection at the forward and backward movement of said hollow cylinder, means for regulating the position of the mould with regard to said injecting nozzle, and means for securing the different parts of the machine so that the shaking, edging and displacing of the parts with regard to one another are prevented, substantially as described and shown and for the purpose set forth.

15. Machine for casting by injection comprising in combination a base frame, a melting vessel, a casing enclosing said vessel,

' means for heating the vessel and for melting the metals, specially hard alloys, in a specially favorable manner, an injecting nozzle of said vessel, a mould composed of several parts, a guide plate upon which saidmould is mounted having two longitudinal slots at its front end, two bearing blocks movably mounted in said longitudinal slots, an eccentric revolubly mounted in said bears ing blocks, a hand lever for operating said eccentric, adjustable set screws engaging, with said longitudinal slots of said guide plate for securing the said bearing blocks in their position, a hollow cylinder in which said mould parts are guided, a couplingmember hingedly and adjustably connecting said hollow cylinder with said eccentric, means for injecting the liquefied metal I through said nozzle into said mould at first;

with the required speed and then with the required pressure, an ejecting device for ejecting the cast piece from the mould located in said hollow cylinder and consisting of a cylinder having a longitudinal slot, a face plate of said cylinder, a screw bolt in said face plate, a cylindrical body at the .rear end of said screw bolt, a disk upon the rear end of said cylindrical body and an ejecting pin projecting from said disk and guided in the front part of the mould, a rod fixed in 'the guide block and traversing said longitudinal slots of the cylinder of the ejecting device designed to operate the ejection at the forward and backward movement of said hollow cylinder, a screw for regulating the position of said cylinder of the ejector with regard to the other parts of the ejector, means for regulating the position of the mould with regard to said injecting nozzle, and means for securing the different parts of the machine so that the shaking,

'- edging and displacing of the parts with regard to, one another are prevented, substantially as described and shown and for; the purpose set forth.

16. Machine for castln by injection com prising in combination a 'ase frame, a melt- 1 ing vessel, a casing enclosing said vessel, means for heating thevessel and for melting the metals, specially hard alloys, in a specially favorable manner, an in ecting nozzle of said vessel, a mould composed of several parts, a guide plate upon which said mould is mounted having two longitudinal slots at its ,front' end, two bearing blocks movably mounted in said longitudinal slots, an eccentric revolubly mounted in said bearing blocks, a hand lever for operating said eccentric, adjustable set screwsengaglng with said longitudinal slots of sald guide plate for securing the said bearing blocks in their position, a hollow cylinder in which said mould parts are guided having an upper window and two lateral windows, a coupling member hingedly and adjustably connecting said hollow cylinder with said eccentric, a block adjustably mounted in said guide plate and carrying said hollow cylinder, a guide plate fixed to said block covering said hollow cylinder and said block and having a window corresponding with the said upper of the hollow cylinder, a pull springattached with one end to a stationary part of the machine frame and with the other end to said block for maintaining the same in the normal po sition, means for injecting the liquefied metal through said nozzle into said mould at first with the required speed and then with the ing vessel, a casing enclosing said vessel,

means for heating the vessel and for melting the metals, specially hard alloys in a specially favorable manner, an in ecting nozzle of said vessel, a mould composed of several parts, a guide plate upon which said 'mould is mounted having two longitudinal slots at its front end, two bearing blocks movably mounted in said longitudinal slots, an eccentric revolubly mounted in said bearing blocks, a hand lever for operating said eccentric, adjustable set screws engaging with said longitudinal slots of said guide plate for securing the said bearing blocks in their position, a hollow cylinder in which said mould parts are guided having an upper window and two lateral windows, a

coupling member hingedly and adjustably connectlng said hollow cylinder with said eccentric, a block adjustably mounted in said guide plate and carrymg said hollow cylinder, a guide plate fixed to said block covering said hollow cylinder and said block the said upper of the hollow cylinder, a pull spring attached with the one end to a stationary part of the, machine'frame and with the other .end to said block for maintaining the same in the normal position, a horizontal rodfixed in front of said block,

and having a window corresponding with an adjustable screw screwed into the rear end of said rod designed to limit the movement of said block, means for injecting the liquefied metal through said nozzle into said mould at first with the required speed and then with the required pressure, an ejecting device for ejecting the cast piece from the mould, means for operating said ejecting device, means for regulating the position of the mould with regard to said injecting nozzle, and means for securing the different parts of the machine so that the shaking, edging and displacing of the parts with re- 'gard to one another are prevented, substantially as described and shown and for the purpose set forth.

18. Machine for casting by injection comprising in combination a base frame, a melting vessel, a casing enclosing said vessel, means for heating the vessel and for melting the metals, specially hard alloys, in a specially favorable manner, an injecting nozzle of said vessel, a mould composed of several parts, a guideplate upon which said mould is mounted having two longitudinal slots at its front end, two bearing blocks movably mounted in said longitudinal slots, an eccentric revolubly mounted on said bearing blocks, a hand lever for operating said eccentric, means for connecting said eccentric with the one part of said mold, adjustable set screws engaging with said longitudinal slots of said guide plate for securing the said hearing blocks in their position, two lateral shuts for reinforcing said bearing blocks, rats for adjusting the position of said shuts and counter nuts for securing the same in position, means for injecting the liquefied metal through said nozzle into said mould at first with the required speed and then with the required pressure, an ejecting device for ejecting the cast piece from the mould, means for operating said ejecting device, means for other are prevenmd, substantially as described and shown and for the purpose set forth. 0

19. Machine for casting by injection comprising in combination a base frame, a melting vessel, a casing enclosing said vessel, means for heating the vessel and for melting the metals, specially hard alloys, in a specially favorably manner, an injecting nozzle of said vessel,- a supporting plate adjustably mounted upon the base frame and having a transverse slit, a heating device for sepa rately heating said nozzle mounted upon said plate so that its position in said slit can be regulated, a mould composed of several parts, means for positively guiding said parts of the mould the one with regard to the other, means for positively guiding said mould with regard to said vessel, means for injecting the liquitied metal through said nozzle into said mould at first with the required speed and then with the required pressure, an ejecting device for ejecting the cast. piece from the mould, means for operating said ejecting device, means for regulating the position of the mould with regard to said injecting nozzle, and means for securing the different parts of the machine so that the shaking, edging and displacing of the parts with regard to one another are prevented, substantially as described and shown and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

OTTO ECKERT. Witnesses:

MAx BETZ, PAUL HASSLER. 

